package string;

public class StringAndStringBuilderDemo {
    public static void main(String[] args) {
      /*  String str="a";
        for(int i=0;i<1000000;i++){
            str=str+"a";
        }
        System.out.println("执行完毕");
        */
        StringBuilder builder=new StringBuilder("a");
        for(int i=1;i<=1000000;i++){
            builder.append("a");
        }
        System.out.println(builder);
        System.out.println("执行完毕");


    }

}
